摘要
提要稀土是化学元素周期表中的镧系元素和化学性质相似的钇、钪共17种元素的统称。稀土有生理活性,对作物有生长刺激作用。全理施用稀土,能改善作物品质增加产量。1985年我们对稀土在牧草上的应用效果及技术进行了研究,并在全国14个省市大面积推广示范,取得了明显效果。试验证明,稀土对牧草的生长、发育有明显的促进作用,能提高干草产量19.0％。而且对豆科牧草根瘤菌有刺激作用,能提高根瘤菌的活性,增加固氮,这对增加土壤肥力和提高豆科牧草生物量有明显作用。稀土除拌种外,还可喷施,通过茎叶表面渗透和气孔的作用,直接被牧草吸收利用效果很好。
ABSTRACT Rare earth is a collective name for 17 elements including ytterbium (Yb), sandium (Sc), and lanthanide series. They have similar chemical properties and are physilogically active or stimulative for crop growth Proper application of rare earth will improve favourably crop growth and thereby increase production. Beginning in 1985 on a country wide experiment study, we have obtained remarkable success for the favourable effect on forage crops by 19.0% increase in biomass and nitrogen fixation enhanced through rhizobium symbiosis on forage legume tests. The application methods can be either seed mixing or seedling sprayed because of stoma absorbtion through stems of leaves of the crop.
出处
《草业科学》
CAS
CSCD
北大核心
1989年第3期22-24,共3页
Pratacultural Science
